基于改进小波阈值的物联网无线通信自干扰抑制硬件设计  

Hardware Design of Self-interference Suppression for Wireless Communication of Internet of Things Based on Improved Wavelet Threshold

作　　者：盖昊宇 张震[1] 姚庆锋[1] 朱炼[1] GAI Hao-yu;ZHANG Zhen;YAO Qing-feng;ZHU Lian(School of Application Engineering,Anhui Business and Technology College,Hefei 231131,Anhui Province)

机构地区：[1]安徽工商职业学院应用工程学院,安徽合肥231131

出　　处：《沈阳工程学院学报（自然科学版）》2021年第4期46-50,67,共6页Journal of Shenyang Institute of Engineering:Natural Science

基　　金：安徽省高校自然科学研究重点项目(KJ2019A1167,KJ2020A1096);安徽省省级质量工程项目(2020jyxm0194,2020szsfkc0115,2020sjjd016);安徽省职业与成人教育学会教育教学研究规划课题(azcg200)。

摘　　要：为了解决传统自干扰抑制硬件第二次消除残存的自干扰信号不彻底,导致信号干扰抑制量小的问题,设计一种基于改进小波阈值的物联网无线通信自干扰抑制硬件。利用改进小波阈值算法对通信信号去噪,针对去噪后的信号,搭建射频模拟消除电路,自适应抵消第二次残存的自干扰信号,依照物联网无线通信基站的带内波动范围,设计自干扰抑制控制器,实现对物理网无线通信中自干扰信号的抑制,完成对物联网无线通信自干扰抑制硬件的设计。将所设计的硬件与传统自干扰抑制硬件进行对比测试,选取相同的数字干扰抑制干噪比范围,计算得到两种硬件的抑制量,结果表明,文中所设计的自干扰抑制硬件的抑制量更大,适合在物联网无线通信中使用。A kind of self-interference suppression hardware based on the improved wavelet threshold is designed for the wireless communication of the Internet of things to solve the problem that the traditional selfinterference suppression hardware cannot eliminate the residual self-interference signal completely for the second time that probably results in the small amount of signal interference suppression.The improved wavelet threshold algorithm is used to denoise the communication signal.Aiming at the denoised signal,the RF analog cancellation circuit is built to adaptively cancel the second residual self-interference signal.According to the in band fluctuation range of the wireless communication base station of the Internet of things,the self-interference suppression controller is designed to suppress the self-interference signal in the wireless communication of the physical network and complete the wireless communication of the Internet of things By comparing the designed hardware with the traditional self-interference suppression hardware within the same DRR range of digital interference suppression,the inhibition capacity of the two kinds of hardware is calculated.The results show that the self-interference suppression capacity of the designed hardware is larger,and it is more suitable for the use in the wireless communication of the Internet of Things.

关 键 词：小波阈值 物联网 无线通信 自干扰 

分 类 号：TN911.72[电子电信—通信与信息系统]